# HG changeset patch
# User Jordi Gutiérrez Hermoso <jordigh@octave.org>
# Date 1550009431 18000
# Node ID 5d383d9636d0b81b416398913b32b8c715e98db5
# Parent  1ab6f5df263ec219165be7056aebe2f77c375353
walkchangerevs: obey allfiles parameter when taking the slow path

When walkchangerevs sees that there's a pattern, it hits the slow
path. The slow path in turn reverts to the old dumb grep behaviour of
only looking at files changed at each revision. Therefore, a command
such as

    hg grep -l --all-files '.*' 'glob:**'

would show you all the nonempty files touched by the current revision.

This modifies that behaviour to look at the manifest at each revision
instead of the changed files in case that --all-files was requested.

diff -r 1ab6f5df263e -r 5d383d9636d0 mercurial/cmdutil.py
--- a/mercurial/cmdutil.py	Fri Feb 08 18:26:35 2019 +0100
+++ b/mercurial/cmdutil.py	Tue Feb 12 17:10:31 2019 -0500
@@ -1961,7 +1961,10 @@
                 else:
                     self.revs.discard(value)
                     ctx = change(value)
-                    matches = [f for f in ctx.files() if match(f)]
+                    if allfiles:
+                        matches = list(ctx.manifest().walk(match))
+                    else:
+                        matches = [f for f in ctx.files() if match(f)]
                     if matches:
                         fncache[value] = matches
                         self.set.add(value)
diff -r 1ab6f5df263e -r 5d383d9636d0 tests/test-grep.t
--- a/tests/test-grep.t	Fri Feb 08 18:26:35 2019 +0100
+++ b/tests/test-grep.t	Tue Feb 12 17:10:31 2019 -0500
@@ -517,5 +517,8 @@
   $ hg grep -r "0:2" "unmod" --all-files um
   um:0:unmod
   um:1:unmod
+  $ hg grep -r "0:2" "unmod" --all-files "glob:**/um" # Check that patterns also work
+  um:0:unmod
+  um:1:unmod
   $ cd ..